New tank setup with a pygmy octopus

rrtanton

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Absolutely...traditional cycling starts from "sterile." It's SLOW, but it works just fine. A handful or two of sand from an established tank at your LFS (many will do that for you for free or a buck) will help a bit.

Lava rock...um...will EVENTUALLY become colonized by bacteria the same way live rock is, but I haven't a clue how long that takes. Nor do I know what lava rock costs... Damsels are not friendly to octopuses, so you may want to look at a different fish...I'm not sure which is friendly though. One guy recommended clownfish.

rusty
 

Colin

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I would just use black mollies that are acclimatised to salt water (takes about an hour or so) and they can be left in when octo arrives, unlike damsels. I would use about 10 or so of them.

Lava rock, like ANY surface in the aquarium will become colonised with bacteria to help in the nitrification cycle. It will never be 'live' rock with corraline algae etc but it will be home to bacteria.

It will take the same length of time that it takes for your tank to become properly matured which is exactly the same length as a piece of string!

C
 

b25oshea

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Lava Rock

Thank you...
So roughly how many pounds of lava rock would be appropriate for a 20 gallon tank? Also, I have read about dead spots when stacking rock. Would the stacking of lava rock create such conditions?

Thank you,
Michael O'Shea
 

Colin

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Well that is entirely up to you how much rock you put in. Its more of a matter of taste than anything else but for an octopus the more the better.
Teh more hiding places you add the quicker it will relax, feel safe and wander from its den.

Yes, you can get dead spots but that was more of a problem with deep sand beds and undergravel filters. Just dont make teh gravel thicker than about 1" or so and position powerheads to make sure that they circulate the water all about the tanks... Some careful planning while adding the rocks will be effective

Cheers
C
 

cthulhu77

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lava rock

instead of using lava rock, you might want to mail order in some live rock or pick up base rock from your local store...lava rock can be VERY tricky in a saltwater tank...those small pits often contain large amounts of metals which will disintegrate in the tank and kill everything. base rock from your local supplier has been pressure washed to remove all that stuff!
 
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